This is a set of two "harder-composite" replacement suspension arms for the XRAY M18 1/18th scale touring car. These new arms have the same camber (-1░) as the stock upper arms, but less caster (6░ caster vs. 12░ caster stock). These arms provide improved steering, better handling into and out of corners. Highly recommended for serious racing and high competitionů prepare to drop your lap times!